Error coins are one of the most fascinating areas of the numismatic hobby. Like all factories, the four current US Mints do everything in their power to avoid making defective products. In the case of the Mints, the defective products are coins, which due to some human or mechanical mistake have been created by accident. Although every effort is made to catch and destroy every single error coin, some have made their way out of the Mints and into the hands of collectors. Once they slip past the quality control inspectors and hit the streets, they’re perfectly legal to own and have become an amazing part of the coin collecting hobby!